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| 型號(hào)： | U4240B |
| 英文描述： | AM - RECEIVER |
| 中文描述： | 上午-接收機(jī) |
| 文件頁(yè)數(shù)： | 1/8頁(yè) |
| 文件大小： | 112K |
| 代理商： | U4240B |
TELEFUNKEN Semiconductors
U4240B
Rev. A1: 12.07.1995
1 (8)
AM-Receiver
Description
The U4240B is a bipolar integrated AM receiver circuit.
It performs all the active functions and part of the filtering
required of the AM radio receiver. The device is designed
for car radio and home receiver applications.
Features
ESD protected
IF output for stereo demodulator and
stop signal generation
AF preamplifier with simple filtering
Controlled RF preamplifier
Double balanced mixer
Separate oscillator with amplitude control
IF amplifier with gain control
Balanced full-wave detector
Audio preamplifier
Internal AGC voltage
Amplifier for field-strength indication
Electronic standby ON/ OFF switch
Block Diagram
50
preamplifier
Balanced
mixer
Standby
switch
IF amplifier
full-wave
detector
amplifier
amplifier
Controlled
RF
AM-antenna
tank
AM-oscillator
tank
IF BPF
Controlled
Balanced
Control
voltage
AF
Internal
supply
voltage
Controlled
oscillator
AM-IF
output
driver
Indicator
5 (6)
6 (7)
7 (8)
8 (9)
9 (11)
4 (5)
3 (4)
2 (2)
1 (1)
18 (20)
17 (19)
16 (17)
14 (15)
13 (14) 12 (13)
11 (12)
10 (11)
15 (16)
GND
V
S
5 k
5 k
7 k
7 k
3.5 k
12 k
170
150
93 7715 e
( ) SSO 20
Figure 1.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| U4240B-A | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:AM - RECEIVER |
| U4240B-AFS | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:AM - RECEIVER |
| U425 | 制造商:SILCONIX 功能描述:JFET Transistor, N-Channel, Dual, TO-99 |
| U425_PDIP | 制造商:MICROSS 制造商全稱:MICROSS 功能描述:a high input impedance Monolithic Dual N-Channel JFET |
| U425_SOIC | 制造商:MICROSS 制造商全稱:MICROSS 功能描述:a high input impedance Monolithic Dual N-Channel JFET |
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